Role of phosphogypsum and NPK amendments on the retention or leaching of metals in different soils

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dc.contributor.author Wazne, Mahmoud
dc.contributor.author Ammar, Rawaa
dc.contributor.author Kanbar, Hussein Jaafar
dc.contributor.author Kazpard, Veronique
dc.contributor.author El Samrani, Antoine
dc.contributor.author Amacha, Nabil
dc.contributor.author Saad, Zeinab
dc.contributor.author Chou, Lei
dc.date.accessioned 2016-06-09T10:53:11Z
dc.date.available 2016-06-09T10:53:11Z
dc.date.copyright 2016 en_US
dc.identifier.issn 0301-4797 en_US
dc.identifier.uri http://hdl.handle.net/10725/3999
dc.description.abstract Column leaching tests were conducted to investigate the effects of soil physicochemical characteristics on metal mobility in the subsurface. The metals investigated originated from disposed industrial waste byproducts and from agrochemicals spread over the farmlands. Soil column tests can provide insights into leaching of metals to underlying water compartments. The findings of this study can be used for prevention strategies and for setting risk assessment approaches to land-use and management, and soil and water quality and sustainability. Soils collected from an industrial (IS) watershed and an agricultural (AQ) hydrographic basin were used in soil column leaching experiments. The soil samples were characterized for mineralogy, functional groups, grain size, surface charge, soil type, porosity, and cation exchange capacity (CEC) along with elemental composition. Varying concentrations of phosphogypsum industrial waste or agrochemical (NPK fertilizer) was then added to the surface of the packed columns (n = 28). The columns were subjected to artificial rain over a period of 65 days. Leachates were collected and analyzed for dissolved Na+, K+, and Cd2+ throughout the experimental period, whereas residual Cd content in the subsurface soil was measured at the end of the experiment. Physicochemical characterization indicated that the AQ soil has a higher potential for metal retention due to its fine clay texture, calcareous pH, high organic matter content and CEC. Metal release was more prominent in the IS soil indicating potential contamination of the surrounding soil and water compartments. The higher metal release is attributed to soil physicochemical characteristics. High calcium concentrations of phosphogypsum origin is expected to compete for adsorbed bivalent elements, such as Cd, resulting in their release. The physicochemical characteristics of the receiving media should be taken into consideration when planning land-use in order to achieve sustainable development. Soil physiochemical characteristics play a key role in determining the behavior and fate of elements upon application of amendments. Sandy soils should not be assigned to industrial zones or landfills due to their high permeability, unlike fine clay soils. Furthermore, application of fertilizers on sandy soils can threaten groundwater quality, whereas their extensive use on clayey soil can cause soil salinisation. en_US
dc.language.iso en en_US
dc.title Role of phosphogypsum and NPK amendments on the retention or leaching of metals in different soils en_US
dc.type Article en_US
dc.description.version Published en_US
dc.author.school SOE en_US
dc.author.idnumber 201205627 en_US
dc.author.department Civil Engineering en_US
dc.description.embargo N/A en_US
dc.relation.journal Journal of Environmental Management en_US
dc.journal.volume 178 en_US
dc.journal.issue 1 en_US
dc.article.pages 20-29 en_US
dc.keywords Mediterranean soils en_US
dc.keywords Disturbed soil columns en_US
dc.keywords Leachates en_US
dc.keywords Elemental mobility en_US
dc.keywords Agrochemicals en_US
dc.keywords Industrial waste en_US
dc.identifier.doi http://dx.doi.org/10.1016/j.jenvman.2016.04.042 en_US
dc.identifier.ctation Ammar, R., Kanbar, H. J., Kazpard, V., Wazne, M., El Samrani, A. G., Amacha, N., ... & Chou, L. (2016). Role of phosphogypsum and NPK amendments on the retention or leaching of metals in different soils. Journal of environmental management, 178, 20-29. en_US
dc.author.email mahmoud.wazne@lau.edu.lb en_US
dc.identifier.tou http://libraries.lau.edu.lb/research/laur/terms-of-use/articles.php en_US
dc.identifier.url http://www.sciencedirect.com/science/article/pii/S0301479716302134 en_US

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